CVE-2022-49919: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: release flow rule object from commit path No need to postpone this to the commit release path, since no packets are walking over this object, this is accessed from control plane only. This helped uncovered UAF triggered by races with the netlink notifier.

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CVSS v3.1 Score

7.0

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-362 CWE-362

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.4.198 — 5.4.224
linux	linux_kernel	5.10.122 — 5.10.154
linux	linux_kernel	5.15.47 — 5.15.78
linux	linux_kernel	5.17.15 — 5.18
linux	linux_kernel	5.18.4 — 6.0.8
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/26b5934ff4194e13196bedcba373cd4915071d0e https://git.kernel.org/stable/c/4ab6f96444e936f5e4a936d5c0bc948144bcded3 https://git.kernel.org/stable/c/6044791b7be707fd0e709f26e961a446424e5051 https://git.kernel.org/stable/c/74fd5839467054cd9c4d050614d3ee8788386171 https://git.kernel.org/stable/c/b2d7a92aff0fbd93c29d2aa6451fb99f050e2c4e

Frequently Asked Questions

What is CVE-2022-49919? +

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: release flow rule object from commit path No need to postpone this to the commit release path, since no packets are walking over this object, this is accessed from control plane only. This helped uncovered UAF triggered by races with the netlink notifier. It has a CVSS v3.1 base score of 7.0 (HIGH).

How severe is CVE-2022-49919? +

CVE-2022-49919 has a CVSS v3.1 score of 7.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2022-49919? +

CVE-2022-49919 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-49919? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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